Re: [PATCH v1 2/2] Strip build path directories in tools, xen and xen/arch/x86

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

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On Thu, Mar 20, 2025 at 10:18:28AM +0000, Anthony PERARD wrote:
> On Wed, Mar 19, 2025 at 02:40:33PM +0100, Marek Marczykowski-Górecki wrote:
> > There are clearly some build path embedding left. And
> > -ffile-prefix-map=/-fdebug-prefix-map= doesn't work correctly with
> > XEN_ROOT having xen/.. at the end.
> > BTW, would it be acceptable to have this?
> >
> >     $(call cc-option-add,CFLAGS,CC,-fdebug-prefix-map=$(realpath $(XEN_ROOT))=.)
> 
> Hi,
> 
> Could you avoid using $(XEN_ROOT) in hypervisor build system? (It's fine
> in "tools/"). In "xen/", there's a few variables you can use if they are
> needed: $(abs_objtree) $(abs_srctree) for absolutes path, and $(srctree)
> $(objtree) for relative path. That also should avoid the need to use
> $(realpath ).

XEN_ROOT is literally "$(abs_srctree)/..". And I need to resolve it to
not have /.. for prefix-map to work correctly. Would it be better to use
literal $(realpath $(abs_srctree)/..)? Or use just $(abs_srctree) and
have paths in debug symbols relative to hypervisor source dir, instead
of xen repo root? I'm not sure if that wouldn't confuse some tools...

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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